مصادر الكيمياء موقع لتعليم الكيمياء بصورة مبسطة
Alkaloid A cyclic organic compound that contains nitrogen in a negative oxidation state and is of limited distribution among living organisms. Over 10,000 alkaloids of many different structural types are known; and no other class of natural products possesses such an enormous variety of structures. Therefore, alkaloids are difficult to …
أكمل القراءة »